1. The belt deviation caused by the center of the nose, tail and middle frame is not in a straight line.
This situation is usually caused by installation. Since the centers of these three are not in a straight line, the longitudinal centerline of the belt is not perpendicular to the axis of the drum, which causes the belt conveyor to run off the track.
2. The improper installation position of the drum causes the belt to deviate at the drum.
A belt conveyor has multiple rollers. The installation position of all the rollers must be perpendicular to the center line of the tape and parallel to the horizontal plane. If the installation level of the rollers is not enough, the rollers move axially, or one end of the roller is at the front and the other is at the back. , So that the installation position of the drum is not perpendicular to the longitudinal centerline of the tape, or the axis of the drum is not parallel to the horizontal plane, the resultant force of the external force on the belt in the belt width direction is not zero, and the belt will deviate in the direction indicated by the resultant force.
3. Conveyor belt joints are not correct, causing the middle part of the conveyor belt to deviate.
Commonly used belt joints have two forms: mechanical joints and vulcanized joints. Either way, the joints are required to be flat. If the joints are not correct, the tension on both sides of the belt will be inconsistent, which will lead to deviations during operation. The deviation caused by the incorrect tape joint is where the tape joint runs, the deviation occurs.
4. Belt deviation caused by improper roller frame or loose bolts that fix the roller frame.
When the belt conveyor is installed, the symmetry of the centerline of the roller group to the centerline of the conveyor frame shall not be greater than 3.0mm, and the upper surface of the roller should be on the same horizontal or inclined surface. If the installation error of the roller set is too large or the fastening bolts are loosened, it will cause the belt to deviate.
5. Belt deviation caused by damage to the conveyor belt.
Conveyor belts are easily damaged during operation. When the degree of damage on both sides of the center line of the conveyor belt is different, the stretch rate on both sides often changes. When the stretch rate on both sides differs greatly, the belts on both sides When the elongation is inconsistent, it is easy to cause belt deviation.
6. The belt deviation caused by the material unloading point is not in the middle of the conveyor belt.
When the material unloading point is not in the middle of the belt, the belt force is unevenly distributed along the longitudinal centerline due to the unbalanced load. When the difference between the two is large, it will directly cause the conveyor belt to deviate during operation. If the conveyor belt does not deviate when there is no load, but always deviates to one side under heavy load, it means that the conveyor belt has been eccentrically loaded. At this time, the position of the receiving hopper or the conveyor should be adjusted so that the conveyor belt is evenly loaded to prevent it from deviation.
7. Belt deviation caused by cutting impact.
When the material falls on the belt, due to the gravity and inertia of the material, it will have an impact on the belt, which may cause the belt to deviate.
8. The belt deviation caused by the accumulation of materials on the rollers and idlers.
For materials with a certain viscosity such as iron powder, they will not evenly stick to the rollers and rollers after they are scattered, causing the rollers or rollers to become uneven locally and run off due to uneven tension. The bulk material phenomenon becomes more serious after the deviation, causing a vicious circle. In wet weather and seaport operations, the probability of such failures is greater. Therefore, the tape cleaner must work normally.
9. The installation angle of the idler roller is not accurate enough to cause the belt to deviate.
If the error between the center line of the load belt conveyor and the installation position of the idler roller is large, the belt will receive lateral force during operation, causing the belt to deviate to one side in the load section. If the installation position of the reversing roller and the supporting roller group is not correct, then whether it is the return section or the load-bearing section, the deviation will be lighter as it goes forward, and it will gradually return to the center line of the frame. However, if the driving drum is tilted, the deviation will become more and more serious.
10. Belt deviation caused by unqualified belt quality.
The belt core density is uneven, and the force is uneven along the belt width. Under the action of tension, the elongation of the belt during operation is inconsistent, causing the belt to run off. If the unevenness of the belt density is caused by the system failure of the production equipment and has a certain regularity, the deviation direction will also show a certain regularity.
11. Belt deviation caused by installation and debugging errors of belt conveyor tensioning device.
Due to unskilled operators, weak sense of responsibility, and inaccurate acceptance during the installation and commissioning process, the belt tensioning device does not work properly, the tension on both sides of the belt is different, and the uneven force causes the belt to run off.
12. Long-term use will cause aging and deformation and cause belt deviation.
After the belt is used for a period of time, slack will occur, which will cause uneven stress distribution in the belt and increase the chance of belt deviation.
13 Belt deviation caused by rack tilt.
If the center line of the frame is skewed and the left and right sides of the frame are horizontally inclined, it may cause the belt to receive a certain lateral tension and pull the belt to one side.
14. Belt deviation caused by serious equipment vibration.
During the operation of the belt, the severe vibration of the belt conveyor equipment will also cause the belt to deviate, especially the radial runout of the idler. The belt deflection is most obvious.
15. Belt deviation caused by too small radius of curvature of the concave section of the belt conveyor.
For belt conveyors designed with concave sections, if the radius of curvature of the concave section is too small, if there is no material on the belt when starting, the belt will bounce in the concave section, and the belt will blow when it is windy. Partial.
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